/*
 * Copyright 2010 Kevin L'Huillier <klhuillier@gmail.com>
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package org.lhuillier.pwsafe.io.v3;


import org.lhuillier.pwsafe.io.DecryptionFailedException;
import org.lhuillier.pwsafe.io.StretchedKey;


/**
 * Converts an encrypted database to its plaintext form.
 */
interface Decrypt {
    /**
     * Decrypts the database and returns its header and records as the
     * plaintext bytes.
     * <p>
     * This will not return any of the values added for encryption, such
     * as the keys, initialization vector, or message authentication code.
     *
     * @param data encrypted database data
     * @param key the stretched password
     * @return the decrypted data
     * @throws DecryptionFailedException
     */
    byte[] decrypt(byte[] data, StretchedKey key) 
            throws DecryptionFailedException;
}
